A Simulation Study for Power Quality Diagnosis and Optimal Solution Derivation in Steel Power Systems Affected by Large DC Mill Motor Loads

The consumer power system in the steel industry is a representative high-power-consuming sector, characterized by predominantly nonlinear loads. Particularly, due to load characteristics that fluctuate irregularly over time, even with large-scale power receiving facilities, there is a high likelihood of power quality issues such as low power factor, flicker, imbalance, and the generation of integer and non-integer harmonics. The steel industry aims to enhance operational efficiency through power energy optimization, maintenance optimization, and productivity improvement, and to achieve this, securing stable power quality is essential. Based on this understanding, this paper addresses the current state of power quality in the industry through an analysis of actual measurements.